This post has been updated to include a comment from the Yadkin Riverkeeper.

Independent laboratory testing indicates that parts of the Yadkin River near the Duke Energy coal ash pits in Salisbury are contaminated with arsenic more than four times higher than surface water safety standards, according to an announcement released by the Southern Environmental Law Center late this afternoon.

Duke Energy did not respond to an email to its communications department this evening.

This portion of the Yadkin River, extending from the mouth of the South Yadkin River to High Rock Lake, is classified as WS-V. DEQ defines these waters as “protected” and “which are generally upstream and draining to Class WS-IV waters or waters used by industry to supply their employees with drinking water or as waters formerly used as water supply.”

Class WS-IV waters are “sources of water supply for drinking, culinary, or food processing purposes.”

The lab, PACE Analytical, was contracted by the SELC, the firm representing the Yadkin Riverkeeper and the Waterkeeper Alliance in lawsuits against Duke Energy. Based in Huntersville, PACE is a well-known lab and has provided private test results in other cases of suspected water contamination to the N.C. Department of Environmental Quality.

Seepage at the base of Duke Energy’s coal ash dams flowing into the river also high levels of arsenic, the SELC says, as much as five times the 2B standard. Other pollutants detected in the river include elevated levels of aluminum, copper, and lead.

Yadkin Riverkeeper Will Scott said the arsenic levels show “exactly why ash at Buck needs to moved to clean lined storage-because if it is buried forever in unlined pits by the Yadkin River-as Duke Energy proposes-the waters of High Rock Lake that people swim, fish and recreate in will continue to be polluted.”